My 1999 BMW Z3 will crank & will not start.I used Bavarian code reader code A9 & code 44 show up.What do I need to replace?

Fuses shouldn't keep blowing and that was the cue to get it looked at. You either need to get it towed to the dealership, or contact a mobile auto-electrician with a pro grade scan tool computer to diagnose the electronics. This is not the type of issue you can fix yourself unless you spend $3.5k to $5k on a bi-directional scanner.

Not sure on this one.....if it's "drive by wire" that means the accelerator pedal is connected to the intake electronically, and that may be where the A9 code comes from. Saturns are drive by wire and it's a common failure point for them. spark, compression and gas is all you need for the engine to run. you can put a fuel pressure gauge on the rail to determine fuel, assume that the compression is good, and pull a spark plug and ground it while cranking to see if gets a spark...

You can get your BMW radio code here instantly:

https://www.carstereocode.com/unlock.php?id=6

could have a ground issue in steering column..

I have found some information i think may help you to sovle your no start issues http://autorepair.about.com/od/troubleshooting/a/ts_no-start.htm

The problem sounds like the battery has run down. Even though the ignition is off, things like clocks and the radio draw small amounts of power to retain their settings, and the instrument cluster doesn't draw as much power as the starter. It usually takes about a month or so to drain the battery. Try jump starting the car, or put it on a battery charger for a while.

dealer only. get model and serial # of radio. Free? Ha!

I would suspect that you pulled a wire off when you were installing the water pump. Check to see if you have spark

if you can heard the fuel pump noise and sure that you have enough fuel, then it may be you have a problem with ignition system or faulty crankshaft sensor.

all the codes you have are all related to the fuel trim, this problem needs to be looked at with a european capable scanner for futher tests sorry.